Hydraulic press



June 20, 1950 F. B. FISHBURNE 2,512,246

HYDRAULIC PRESS Filed July 16, 1946 5 Sheets-Sheet l June 20, 1950 a. FISHBURNEM 2,512,246

HYDRAULIC PRESS Filed July 16, 1946 5 SheetFSheet 2 June 20, 1950 F. B. FISHBURNE 2,512,246

HYDRAULIC PRESS Filed July 16, 1946 5 Sheets-Sheet 3 Q. I l

2 U1! 11111 1 1 1 1 1/ 1111 11 11 4 g 24 27 2a 22 a 2/ 2d? g 45 June 20, 1950 v F. B. FISHBURNE 2,512,246

HYDRAULIC PRESS Filed July 16, 1946 5 Shets-Sheet 4 June 20, 1950 EB. FISHBURNE 2,512,246

HYDRAULIC PRESS Filed July 16, 1946 5 Sheets-Sheet 5 16 2 2 i mi"; 1

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Patented June 20, i6

2,512,246; HYDRAULIC PitEss FranisBi Fishbiirn'e, A'shwiile', Amiiicatim July is; 1946-Sei-fai mast-ass 13 Claims. (01. 106-41";

This inventioiirel-ates towers-mm presses; and more" particularly to that tj fie of press emp ying' an aedum uiatorin'whih' pressure isbiiilt up bit-means era 1 Hydraulic presses asheretofore constructed Havel-13112.11? eiiihddieda massive east iron frame of s'iiifioient weight and strength to withstand the strains to which it is subjected. Such air paratus na's t l-i'l foienot Orfly been XCSSiVeIy heavy; but-aisle relatively" expensive to' prod ue" one of the ifioiiects 'ofthe I'Jres'iit invention thereforeis 'td-desigia a press frame whidh may be readilytabri'cateii fion f steel plates; by mea ns' of welding, and which, While possessing 'th $9,1 3? strength,- wifl-be both 'lig'htinweihtaihd relatively 'merpnsw" to manufacture:

Furthermore; -*hydfau1icpresses f the ac ciirnuiato r" time as -'here'tofo're con striictedjitfifais been 'the cb'rii'inon praetieeto provide a'ccumiflatbr tanks or the like separate fror'r'i"ah'd inaddition to the press itself; thus requiring a large amount or floor space. Another object of'the'pre'seiit'in vention is to provide a-hollow press *fr'anie havin'g the necessary accumulator structure entldsfed within the same;- 's'o-th'atthe-apparatus i'sf s"e'1 contained and compact and occupie's b'tit-reiatiife mime floor space. u

In order to render theapparatus'stiIIIfiore 'COm pact,- and to still further eonserve floorspace:

the invention 'donfte'mpiates mounting-me pnnifi 3b and? control l riecl'ialiiSn'i ailsb 'whbll y 'withifi the"; hollow press" frame. Inaddition; 'ri'iy imlsr'avee press frame contains a chariibei'eoristitiitin-the 1iqiiic i're'servoir from which iiquidis'piimped into the accumulators. Thu'sfwith myiirii'prov'ee com struotion, the entire p 'ress -and"a11 "of*its"=aeees= sorie's 'cons'titiite' but -acbriimete ufiit} no oiits id'e apparatuswhatsoever being required} v In order that the invention"maybeeleairly11nderstood; referenceis had; byway ofillustr'ation to 'the accompanying drawings, forming-part o f this-sneoificatioii, and in which Fig; 1 is errant elevation of the com'p'leiae'fiiress} parts being broken away; v

Fig; 3'is area'r elevation thereof. I v

Fi s.- 4; 5 an'dfi are view ssimilar w ngs; "1; 2-1 '3; "but showing only thaf'rame' 0f the press stripped 'ofail'mehanisnr:

f 7 "is a lan view of "the frame 'as' shown irr' .r

Fig. 8 is a; transversesec-tion' "substantially on; the line 8+8 of Fig; 5-1ookingin' the"direction"oi" the arrows;

. 2 a the line 99 of Fig. 5 looking: in -the direction of the arrows.

'Fig. 10v is a side elevation of the accumulator str uetureritsem and associated parts, detached from .the pressiframe,*parts being in section.

Fig. 11 is .atsimfia'r view taken at right anglesto Figr llfli Figs; 12- and -13 areasections; respectively, on the lines. ilk-121.1161.- =l13+ 1l3 :of .Eig. 10 looking in thedirectionsiofitheiarrowsi- Fig. 14:is av diagrammatic viewrillustrating a simpiechydraulic system: which may be employed.

Fig; i5; is a horizontal fragmentary section .on asomewhat enlargedsc'aletaken substantially on the knew-451011 Fig; 2:1ookin'g in'the direction of the arrows.

.E'ig; 161s a vertical :iongitud-inal section through the upper partnf my improved ,press frame parts ibeingebrohenwaway and parts being showninzdottedxlinesi, i

Fig.,1-7 is aghorizontai:sectionsubstantially on the line j;'l-t l"l of- Eig. 16-1ooking in the direc; tion of the rarrgws,;.-the parts shown in dotted lines in;.Fig-. -1 6 beingomitted for the sake of am sssi d A. X H a.

Fig. 18 is a trans-verse seqtion on the line 18 -18 -i e-1l'l ok ng-:inre r ti n Qt e, PQW-i- I Referring; to the; drawings in detail, vLhaye i1 u i rre g HQ 3 arresa i ere t9 ;..W1 is may ea er fer a art a the ramesxter i tm fli i zi sfle pr d port a platen andapower rcylindefin o'iip'osed" re- 4*; V W. i

My improved" press frame isfhdlio'w and" is faloricated' from steel rilat els se'c'iired together" time their ages as Items of ao'ty1eiie" or I u h c somewhat greater width ew-1; welde eretdf is d'e'signateii Ii-i is of t eatre distance tat V aarid prbi ts fieyqne' hes rile; e He filate'fi a i' sumacrtedf-ts auxiliary welded at their front edges to the plate 6 and at their rear edges to filler plates 8 and 9.

Adjacent the rear edge of the press frame are pedestals 2a and 3a., and adjacent the plates 8 and 9 are pedestals 8a and 9a, these pedestals having openings by means of which the press may be bolted to a, Suitable foundation.

Referring again to Fig. 9, it will be seen that between the plates 6 and l and. the side plates 2 and 3 I provide additional vertical supporting plates l2 and i3, welded to the plates 6 and I. It will thus be understood that all of the plates 2, 3, 6, 1, iii, ll, l2 and I3 cooperate in effectively supporting the platen l5, so that this platen may readily withstand all of the strains imposed upon it.

Referring to Figs. 1, 2, 4 and 5, it will be seen that the gap in the press frame between the power cylinder and platen is formed by a curved plate 14 bent to the desired shape and welded to the side plates 2 and 3.

The space between the side plates in which the power cylinder is mounted, as hereinafter described, is closed by a cover consisting of a front plate is and side plates Eta, held in place by cap screws ll, passing through the latter.

A horizontal partition I8 extends across the upper part of the press frame as shown in dotted lines in Fig. 5 and in full lines in Figs. 4 and 17, and constitutes a floor for supporting the pump and control mechanism hereinafter more particularly described. In order to afford access to this pump compartment formed by the partition Hi, the top, side and end plates aredivided along the line iSa in Figs. 2 and 5 to form a removable cover l9.

Referring now particularly to Figs. 16 to 18, the power cylinder is indicated at 20, and this is supported by means of a specially designed adapter. This adapter comprises a transverse plate 2| and a pair of extra heavy side plates 22, welded together, and the plates 22 fit snugly against the side plates 2 and 3 and are welded thereto. The opposite sides of the cylinder 20 are formed with flat carefully machined faces which fit against the inner faces of the plates 22, and the cylinder is secured in position by means of large cap screws 23 which pass through the plates 2, 3 and 22 and into the relatively thick walls of the cylinder. The cap screws ll, heretofore referred to, also engage the plates '22.

The front edges of the top plate 5 and curved plate it are made of arcuate shape, as indicated at 50. and Ma respectively, to fit around and embrace the power cylinder 20.

As stated in the preamble, one of the important features of the present design resides in the fact that an accumulator structure is built into the hollow press frame. This accumulator structure preferably comprises one or more tubular or cylindrical containers 24, two such containers being shown. They extend from the bottom plate I to the partition I8 and are disposed one behind the other transversely of the press frame in such a manner that they substantially fill the space between the side plates 2 and 3 as best shown in Figs. 8 and 9. At their forward side, the space between the tubular members 24 is bridged by a filler strip or plate 25 welded thereto. Also, at the lower part of the frame, I provide a pair of vertical brace plates 26 welded at their forward edges to the transverse plate I, and at their rear edges to the tubular containers 24. Similar brace plates 26 extend between the upper part of the cylinders 24 and the plate 2| of the adapter above described, as shown in Fig. 8.

At the rear side of the cylinders 24 the spaces between them and between each of them and the adjacent side plate are bridged by filler strips or plates 27, 28 and 29, these strips or plates being welded to the cylinders and to the side plates, as clearly shown in Figs. 8 and 9. Thus, the cylinders are anchored or tied to each other and to the side plates by welding.

It will thus be seen that by virtue of the various longitudinal and transverse plates, combined as described with the pair of vertical tubular members 23, an exceedingly strong and rigid fabricated structure is produced, the tubular members 2d serving not only as an accumulator structure but also as an important part of the press frame itself, serving to effectively reinforce and strengthen this frame.

Furthermore, the filler strips 21, 28 and 29 serve to effectively seal off the rear portion of the interior of the press frame to form a chamber 35, of which the accumulator structure forms one wall. I utilize this chamber as a reservoir for the liquid employed to operate the press. Access to this reservoir is afforded by manholes 4a and 4?), closed by covers 40 and 4d, as shown in Figs. 3 and 6.

Adjacent one corner of this chamber I place an angle iron 30 which is welded at one edge to one of the tubular containers 24, and at the other edge to the side plate 3. This angle iron forms a vertical passageway, sealed olf from the liquid in the chamber 35.

Adjacent and forward of this passageway is a short section of pipe extending horizontally and transversely through the container 24, as indicated at 31 in Figs. 9, 10 and 13, this piece of pipe constituting a tunnel extendingthrough the accumulator member.

The two cylinders or tubular containers are connected at their top by a pipe 32, as shown in Figs. 10 and 12, and at their bottom by a pipe 33,,

this pipe having connected therewith a supplypipe 34 by which liquid is delivered to and from. the accumulator.

A plunger 36 operates in the power cylinder 20. and reciprocates toward and from the platen l5. To this plunger is attached an arm 31 having at its free end an eye which fits freely around arod 38 slideably mounted on a bracket 39 and having suitable stop collars thereon adapted to be engaged by the arm 31. nected with the control valve, and when shifted by engagement of the arm 31 with the collars, serves to operate the valve so as to limit the movement of the plunger in either direction This is the usual limit stop arrangement and requires no detailed description.

Two manual control levers til and M are provided, one at the front of the press adjacent the platen, and the other at the side, as clearly shown;

this is pivotally connected with an up-and-down' rod 44 which extends up through the vertical passageway to a four-Way control valve, such valve being indicated at 41 in Fig. 14. The lever 4! is pivotally mounted in an opening in the side plate 3 and has a bifurcated end 45 which straddles,

This rod 38 is eon- The and is connected with therod 443 I l'1'us;.'by. rocking.-eithe1.';thelever 40 orthelever 4|, themed 44 may be: reciprocated and: the valve shifted: as desired.

. In-Fig. 14, I:' have illustrated a simple. hydraulic arrangement which may, be employed-in connectionwith my improvedpress, although such an arrangement constitutes no part of the present invention, and is illustrated byway of example only. In this figure, the power cylinder is-indicated at 20, and a pipe 46 communicateswith the upper. end and a pipe49 with the lower end. These two pipes are controlled by the four-way valve 41-above referred to. From this valve ex t'e'n'dsa pipe 48-to the liquid reservoir 35, and from the valve also extends another-pipe comprising the-sections59 and which connects with'thje delivery side of a pump- 52, the intake side of the pump 'beingconnected with a pipe 53 and ex tendinginto the liquid reservoir 35;

lfnterposed'in the pipe line-5D, 5| is an ordinary check valve 55:. and an unloading valve 54, a bypass or remote control pipe 51 extending around the check valve 56 as shown. A so-called sequence check valve 58 is connected at oneside to the pipe line 50 and at the other side to the supply pipe 34 which delivers into the accumulator 24.

When in neutral position, the four-way valve 41 blocks the pressure line from pump and accumulator. When the pump is started, the pressure builds up rapidly until it reaches the predetermined setting of the sequence check valve 58, when this valve opens and allows the pump to store liquid in the accumulator. the accumulator rises, the contained air is compressed and the pressure increases until the setting of the unloading valve 54 is reached, whereupon this valve opens and the liquid is by-passed from the pipe 5! back through the pipe 55 to the tank or reservoir 35. The check valve 56 prevents the liquid stored in the accumulator 24 from flowing back through this by-pass also.

When one of the levers 40 or 4| is shifted, say, to the down position, the liquid in the accumulator flows freely through the sequence check valve and pipe line 46 to the top of the power cylinder. In addition, the moment there is a pressure drop in the remote control line 51 which causes the unloading valve 54 to close, thus forcing liquid from the pump out through the line 50, thus adding this volume of liquid to that from the accumulator.

As the plunger 36 moves downward, a point will usually be reached where the pressure in the accumulator will drop to a point less than that required to cause the plunger to perform the desired work. At this point, the sequence check valve will close, thus cutting off the accumulator and allowing the pump to furnish the necessary pressure to finish the stroke. Thereupon, the pressure in line 513, generated by the pump, continues to rise until the sequence valve opens again, allowing the pump to refill the accumulator.

It will be understood that all of the mechanism and apparatus shown in Fig. 14 is contained within the space between the two side plates 2 and 3 of the press frame. The valves 41, 54, 5B and 58 will ordinarily be contained in the chamber or compartment above the floor l8. For the sake of clearness and also because various different arrangements of valves and piping may be employed, I have not attempted to illustrate this mechanism in the other views of the drawing. In Fig. 16, however, I have shown in dotted lines As the level in thepipeslS; 5i and 53; and:'the"pump 52,'illus trating the same as being; driven by anelectric motor 591 Also the pipe 46 has been showiiin Figs; 1, 2 and-3;

What I claim is:

1 A hydraulic press frame of the gagitype comprising a hollow structure composed of side and edge" plates welded together along their meeting edges, and a platen'restin'g on a portion; of said" side plates. adjacent the gap, said-platen. projecting laterally beyond said side plates and. the projecting portions being supported by aux-= iliaryl vertical: plates rigidly connected with said? side plates by welding.

2; A hydraulic-- press frame of the ap type comprising a hollow structure composed of side and edge" plates welded together along their meetingedges,- a platen resting on a portion of? said' side plates adjacent the gap, said platen. projecting laterally beyond said side plats'and'. the projecting portions being supported by aux iliary'vertical plates,-and avertical front plate; bridging said side and auxiliaryplates and weld ed th'ereto.

3; A hydraulic press frame substantially rect'angular in' horizontal section and comprising; side and botto-mplates, and one edge plate"uni-t ed alon their edges by welding, said side and; edge plates providing three walls of a chamberconstituting a liquid reservoir, and a vertical ac-- cumulator structure disposed between said side: plates at a point spaced from said edge plate, said chamber having a fourth wall formed at; least in part by said accumulator structure.

4. A hydraulic press frame comprising spaced side plates, and an accumulator consisting :of a Vertically extending, closed, hollow structure interposed between said side plates and anchored thereto by welding.

5. A hydraulic press frame comprising spaced side plates, and an accumulator structure composed of one or more vertical cylinders located between said side plates and anchored thereto by welding.

6. A hydraulic press frame comprising side, edge and bottom plates forming a chamber constituting a liquid reservoir, and an accumulator structure including one or more vertical cylinders disposed between and anchored to said side plates by welding, said accumulator structure serving as one wall of said liquid reservoir.

'1. A hydraulic press frame comprising side, edge and bottom plates forming a chamber constituting a liquid reservoir, an accumulator structure also contained between said side walls, a pump for delivering liquid from said reservoir to said accumulator, and a chamber between said side walls and above said liquid reservoir in which said pump is mounted.

8. A hydraulic press frame comprising spaced side plates, a vertical accumulator structure enclosed between said side plates and welded thereto, a power cylinder also located between said side plates laterally of said accumulator structure, and vertical brace plates extending between said accumulator structure and power cylinder and tying them together.

9. A hydraulic press frame of the gap type comprising spaced side plates extending beneath the gap, a platen supported on said plates, a transverse vertical plate extending between said side plates adjacent the platen and tying them together, an accumulator structure mounted between said side plates and anchored thereto, and

Vertical 'brace plates, connecting said transverse plate with said accumulator structure.

10. A hydraulic press frame comprising side, edge and bottom plates forming a chamber 'constituting a liquid reservoir, 2. pump and control mechanism located within said frame above said reservoir, a vertical passageway extending up through said liquid reservoir to said control mechanism, an actuating rod extending through said passageway, and a control lever mounted on said frame and operatively connected with said rod.

11. A hollow press frame comprising spaced side plates, a plurality of accumulator cylinders disposed between said plates and tied thereto and to each other by welding, control mechanism mounted in the upper part of said frame, a. tunnel extending through one of said accumulator cylinders, and an operating rod passing through said tunnel and connected with said mechanism.

12. A hydraulic press frame comprising a base plate, a pair of spaced side plates secured to said base plate, and a pair of closed accumulator cylinders extending vertically from said \base plate between said side plates and tied to each other and to said side plates by welding.

13. A hydraulic press frame comprising a pair of spaced side plates, and an accumulator unit consisting of a separately formed, closed, hollow structure disposed in and substantially filling the space between said side plates, and anchored thereto by welding.

FRANCIS B. FISHBURNE.

REFERENCES CITED The'following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 841,150 Hoberg et a1. Jan. 15, 1907 1,954,651 Sherman Apr. 10, 1934 2,173,086 Dinzl Sept. 19, 1939 2,215,287 Fox et a1. Sept. 17, 1940 2,319,232 Holmes et a1 May 18, 1943 2,349,082 Ernst et ai May 16, 1944 2,408,312 Hubbert Sept. 24, 1946 FOREIGN PATENTS Number Country Date Germany Feb. 14, 1936 

